Tricone Bit IADC637R

These Grand tungsten carbide insert bits are used to drill soft formation with low compressive strength and high drill ability, such as shale, clay, sandstone and soft limestone, etc.

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Description

Hardfacing

Tungsten carbide particle hardfacing is applied liberally along the shirttail and extended up the leading edge of the bit leg for additional protection in high- -speed, directional or abrasive applications

Six-point Gauge Stability

The design delivers near six- point contact with the borehole wall for unequalled bit stability that protects the cutting structure from damaging lateral blows

Gauge Inserts

More tungsten carbide inserts are placed in the gauge to reduce the wear in the abrasive formation. It can protect gauge and increases the stability and life of the bit.

Cone insert

Spherical shape increases bending resistance of the insert, enhances wear resistance and operation life of the bit. Recommended for hard and very hard formations.

Nozzle

Optimized flushing system including three combined nozzles, balances fluid flow, allos effectively cleaning bottom- -hole zone and anti- balling.

Note

Technical Data

Bit Size		IADC Code	API Connection	RECOMMENDED PARAMETERS
in	mm	IADC Code	API Connection	Rotary Speed(rpm)	Weight On Bit(KN)
8-1/2"	215.99	637R	4-1/2"API	180~40	0.5~1.1
9-1/2"	241.3	637R	6-5/8"API REG	180~40	0.5~1.1
17-1/2"	444.5	637R	6-5/8"API REG	180~40	0.5~1.1